Nikoncamera ccd size comparison

A very rough generalization: Canon fixed focal length lenses are usually less expensive than their zoom counterparts - if they have comparable wide apertures.

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The anti-reflection stack is the most important part of the Reflection Free lens. It is made up of quarter wavelength interference layers of alternating high and low index materials. The usual materials are silicon dioxide with a low refractive index of 1.45 and titanium dioxide with the higher refractive index of 2.25.

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In the near future 1/3” full-HD image sensors may become more interesting as the optics are improved to allow for additional reductions in SWaP-C.  Further testing may show that rolling shutter is acceptable in outdoor, moving applications with higher frame rates, such as 100 fps, so that the blurring effect is not evident.

1/2.3 sensorsizevs 1 inch

A motion sensor with a camera is called an image sensor, it's very obvious what they are just looking at them. They're also very uncommon.

Each of these numbers and letters relays essential information, such as focal length, maximum aperture, lens version and focusing motor.

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Anti-reflection coatings are made from extremely thin layers of different dielectric materials that are applied in a high vacuum onto both surfaces of the lens. The quality of the AR depends upon the number of layers applied to the lens. The early coatings had only a single layer of magnesium fluoride or perhaps two but nowadays most coatings have at least six layers and are known as broadband coatings.

4/3 sensorsizevs 1-inch

1/3” CMOS image sensors can offer good low light performance, but 1/3” CMOS sensors utilize a rolling shutter as compared to global shutter available in CCD and larger CMOS image sensors.  Currently rolling shutter is not well received in the industrial and military applications as a blurring effect occurs with movement.  Global shutter CMOS is more complex and will take further development to shrink for smaller pixels.

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Anti-reflective coating is also applied on the back surface of sunglass lenses. Coating the back side helps in reducing the lights which comes from behind you and bounces off the surface into your eyes. Back-side coated sunglasses are more comfortable than standard uncoated ones. 11/12/2007

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For upgrades, this provides the option to use the same optical format, but have more pixels and more sensitivity.  This can be a cost-effective approach although new optics are still required.

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In theory, bigger pixels on full-HD CCD image sensors are better for global security applications because they are more sensitive for improved low light performance.  The drawback is that bigger optics are required so size, weight, power, and cost (SWaP-C) requirements are challenged.  As many systems are upgrading from standard definition to full-HD cameras or adding HD daylight cameras for full motion video, the question is how to find the optimal balance.

Not all of the 1/2” optics available meet the full MTF so the camera provides a better image quality than the lens.  The resulting image might not have the sharpness required by high-end applications.  The optics are getting better and better though.

For now, 1/2” image sensors provide a sweet spot for many global security applications with acceptable sensitivity and the ability to use small, low cost optics.  As I mentioned, for more demanding applications, 2/3” image sensors may be required.

with the last step arrived at using the definition of the Fourier transform, Eq. ... These two sections of the MTF are referred to as tangential MTF and sagittal ...

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To use smaller and even lower cost optics, it is attractive to go below the 1/2” sensor size, for instance 1/3” CCD image sensors.  Not only does the image sensor performance go down, but the available optics quality also decreases.

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High-end applications, such as long range targeting or in very low light, which are moving to full-HD resolution will still require 2/3” sensors.  Over the last few years, there have been dramatic improvements in Qe and read noise of image sensors to make 1/2” full-HD sensors with the sensitivity required for many applications.  In parallel with the sensor improvements, there have been many developments in 1/2” long focal range optics and zoom optics as a necessary complement.

One of the characteristics of an AR coating is the color of the residual 1% reflection on the lens – sometimes called the bloom. On modern broadband Reflection Free lenses it can be tuned to either a soft green or blue without compromising the quality of the anti-reflection properties. The AR bloom should not be confused with a permanent lens tint. An AR bloom is imperceptible and can only be seen when holding the lens up to sunlight or artificial light.

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To complete the stack other materials are used to assist with bonding, to create the abrasion resistant properties and for the water repellent top coat.